[zeromq-dev] ZMTP/1.1 - proposal

Fabien Ninoles fabien.ninoles at ubisoft.com
Mon May 16 18:22:04 CEST 2011

We can enter a bug stating that ZMQ 2.1 will crash when connected with 2.2/3.0 sockets.  Couldn't we consider forward incompatibility as a bug ?

Otherwise, we could wait and see if the change really break 2.1.  I don't think any 2.1 sockets would break on new flags, and if we can introduce the new control command without breaking the old sockets pattern, that would be even better.


-----Message d'origine-----
De : zeromq-dev-bounces at lists.zeromq.org [mailto:zeromq-dev-bounces at lists.zeromq.org] De la part de Dirkjan Ochtman
Envoyé : 16 mai 2011 11:37
À : ZeroMQ development list
Objet : Re: [zeromq-dev] ZMTP/1.1 - proposal

On Mon, May 16, 2011 at 17:22, Pieter Hintjens <ph at imatix.com> wrote:
>> Strictly taken it seems like adding a version header check would go
>> against the bugfix-only rule for 2.1 inclusion (changing the wire
>> protocol and semantics).
> Yes, we don't want new protocol support or semantics in 2.1, it's
> dangerous and not needed. But I'd like to make 2.1 apps resistant
> (i.e. not crash) when hit with modified ZMTP protocols.

I understand, I'm just stating that this would go against the release
policy outlined on the wiki, so that either (a) the release policy
maybe should be changed, (b) the non-compliant change should be
pointed out exhaustively in the changelog, (c) the new version header
should be delayed to 2.3/3.0, with 2.2 the first version checking the


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